Which action is an example of conservation? taking a shorter shower
turning off a light when it is not being used
shutting off a water faucet while brushing teeth
all of the above

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter